| Acronym | Meaning |
| PSA-CCSD | Partially Spin Adapted-CCSD |
| SOP/EA | Split-operator Propagator (for) Electronically Adiabatic (phenomena) |
| ARIM | Accelerator And Reactor Improvement And Modification |
| HSCR | Hirschsprung Disease |
| FAAO | Free-atom Atomic Orbital |
| DEM | Distinguishable Electron Method |
| RMP | Restricted Moeller-Plesset |
| CIDEP | Chemically Induced Dynamic Electron Polarization |
| TALEST | Tandem Arrayed Ligation Of Expressed Sequence Tags |
| BIIR | Brominated Isobutene-isoprene Rubber |